Key-locking device



W. A. HOLQUIST.

' KEY LQCKING DEVICE.

. APPLICATION HLED} APR-7.1921.

1,418,872. PatentedJune 6, 1922.

INVENTOR:

W/LL/AM A. HOLQUIST,

iii? ST WILLIAM A. HOLQUIS'I, OF LOS ANGELES, CALIFORNIA.

KEY-LOCKING DEVICE.

T 0 all whom. it may concern Be it known that I, VVILLIAM A. HOL- QUIST,a citizen of the United States, residing at Los Angeles, in the countyof Los Angeles and State of California, have invented a new and usefulKey-Locking Device, of which the following is a specification.

This invention relates to devices for engaging a key so that the keycannot be removed from the lock; more particularly holding a door key,placed in the key-hole of a door from the inside, so that the key cannotbe pushed in from the outside.

One of the objects of this invention is to provide a simple and durabledevice, easily put in place and easily removed, but not removable fromthe outside.

Another object is to provide a device made of a single piece of materialrequiring no locking within itself.

Other objects will appear from the following description as well as fromthe accompanying drawing, in which- The figure is a front elevation ofthe device.

With common door locks, a key can normally be used from both sides ofthe door, the key-hole extending through the lock and through the wholedoor. If a key is placed in the keyhole from the inside of the door, itcan normally be pushed out of the door and lock from the outside; and, askillful manipulator is even able to unlock a door with the very key,left in the lock from the inside to prevent the use of another key fromthe outside, by manipulating from the outside with such a key. If a keyis left within a lock of a door, it is usually with the intention orwith the idea in mind to prevent the inserting of a pass-key or anyother key from the outside, and thereby making a common lock moresecure. From the above, it appears, however, that the leaving of the keyalone is not suflicient, and that skillful manipulators have found waysand means to turn a key, left in a lock from the inside, from theoutside. Means must be found and provided to hold a key, left in a lockfrom the inside of a door, against movement and manipulation from theoutside of the door.

The device illustrated in the accompanying drawing is intended to hold akey 1921. Serial No. 459,433.

against turning movement and thereby preventing a pushingout of the keyfrom the outside.

The device is preferably made of wire in form of a bent yoke to be hungover the knob of a door.

A wire is therefore bent upon itself so that its two ends 1 and 2terminate at practically the same distance from the main. body 3. Thismain body of the device is curved to easily slip over the stem of a doorknob, an approximate cross section of a stem of a door knob beingindicated at 1, the wire curving in on both sides of the knob, asindicated at 5 and 6.

The device is preferably made of spring material, so as to easily slipover the stem of a door knob and, in engaged condition and. position,capable of engaging around the stem of the door knob in the mannerillustrated.

From the curved portions 5 and 6, both ends of the wire curve outwardly,as indicated at 7 and 8, and again curve inwardly as indicated at 9 and10, and once more curve outwardly as indicated at 11 and 12.

A key 13 is normally inserted into a keyhole 14 in an upright position,so that the handle of the key is practically in alignment with theupright key-hole.

F or using this device, the key is turned to a practically horizontalposition, as illustrated in the drawing. The two ends 1 and 2 of thedevice are inserted through the handle of the key 13, the device beingthen practically in a position between the door and the door knob properaround the stem 4 of the knob, so that, on a further movementdownwardly, the bent portions 11 and 12 snap through the handle of thekey below the handle and the bent portions 5 and 6 snap around the stem4 of the knob to a point below the stem, as illustrated. The key is thenprevented from turning by the bent portions 7 and 8 above the handle ofthe key and by the bent portions 11 and 12 below the handle of the key.In this position, the key cannot be turned from the outside, nor can itbe pushed out from the outside towards the inside of a room.

Having thus described my invention, I claim:

In combination with a door knob and a key, a locking member comprisingan elon- Specification of Letters Patent. Patgnted June 6, 1922,Application filed. April '2,

gated body bent upon itself forming a my invention I have signed mynamein the nearly circular portion to engage aronndothle presence of twosubscribing witnesses. door knob a ainst n Ward shift/in ot1 f Y 1 endsextendifig farth r downwardl? to a wlLLlAM HOLQUlb'l' 5 point to passthrough the handle of the said Witnesses:

key to prevent a turning of the key. 0. H. KRUEGER,

In testimony that I claim the foregoing as JESSIE A. MANooK.

